Three polarizing disks whose planes are parallel and centred on common axis. the directions of their transmission axes relative to the vertical are respectively: θ1 = 33o clockwise, θ2 = 24o "counter-clockwise", and θ3 = 11o clockwise. a beam of light polarized along the vertical is incident onto the first polarizer with an intensity of i0 = 40.0 w/m². calculate the transmitted intensity through all three polarizers.

The us government wants to allocate billions of dollars in the next 10 years to assure our future energy security. the funds will be spread among a variety of possible energy resources. where do you think the government should put the greatest support: solar energy, wind energy, clean coal, oil exploration, gas exploration, or a combination of sources? are there other efforts that should be explored? support your position with cited information for both questions.

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.

The radius of an atom is closest in size to a